Great Scientists教案

   not everyone is cut out to be a competitive athlete, but there are things that we can do to strengthen our physical well-being. experts recommend that spending as little as 30 minutes each day on physical activities provides benefits including lower risk of heart disease, cancer, high blood pressure, diabetes (糖尿病) and other serious diseases. taking steps to become physically fit does not have to mean acquiring expensive training equipment or a gym membership. exercise can include simple walking and running, gardening, cleaning the house, swimming, tennis, bicycling (stationary or on the road) and so on. the key is to do it on a regular basis.   healthy lifestyles also require good nutritional habits. when choosing foods, nutritionists advise whole grains, flesh fruits and vegetables, fish, and lean (瘦的) cuts of poultry and meat. the benefits of drinking eight full glasses of water a day are also documented. water provides the means for nutrients to travel to all our organs, improves skin tone  (柔韌), regulates body temperature and contributes to muscle strength and control, which is confirmed by scientists.   fitness results in completing the tasks of daily living, working a full day, and still having energy to participate in recreational activities. by being fit, you'll find that you enjoy recreational activities even more because you won't be tired or suffer from gore muscles.   it is time, folks, to get moving. so let's all get out there and do some exercise!41. what's the author's purpose of writing the passage?    a. he wants to ask people to respect the disabled.    b. he intends to call on people to do exercise.    c. he wants people to know the importance of exercise for the disabled.    d. he wants to explain what healthy lifestyles are.42. what does the underlined word "documented" mean in paragraph 3 ?    a. written.             b. encouraged.             c. overlooked.              d. proven.43. according to the passage, physical activities bring benefits to humans except __________.    a. lower risk of heart disease      b. better muscle control    c. less chance of getting diabetes    d. less chance of having high blood pressure